gecko-dev/dom/workers/test/fileReadSlice_worker.js

17 строки
421 B
JavaScript

/**
* Expects an object containing a blob, a start index and an end index
* for slicing. Returns the contents of the blob read as text.
*/
onmessage = function(event) {
var blob = event.data.blob;
var start = event.data.start;
var end = event.data.end;
var slicedBlob = blob.slice(start, end);
var fileReader = new FileReaderSync();
var text = fileReader.readAsText(slicedBlob);
postMessage(text);
};